China National Standards

China Confidentiality system audiovisual Industry Standards English PDF List

  •  China "Confidentiality system audiovisual" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    YD/T 937-1997 Confidentiality system for audiovisual services
    视听业务的保密系统    		 China Telecommunication Standards
    Confidentiality system audiovisual
    English PDF

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